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UCC2891: UCC2891 Protection function and power SPEC check

Rock Shao
Expert 2995 points
Part Number: UCC2891
Other Parts Discussed in Thread: LM5026, , UCC2897A

Hi,

This is Rock.

May I check the UCC2891 or LM5026/UCC2897A can meet the following protection function of SPEC requirement? 

Specification
Vin: VDC 40~60V
Vout: VDC 30V +/- 3% / 10A
Ripple & Noise: +/- 1%(mV)
Efficiency: 90% at 50VDC Vin
Operating Temperature: -40~85 deg.
No Load condition: The unit can be powered up under zero load conditions while output shall stay within regulation. 

Protection function:
OVP: latch shutdown within 110%~130%
OCP: either hiccup or latch
SCO: either hiccup or latch
OTP: It is optional. If equipped with it, can be hiccup or latch.
Brownout(UVLO): ON at >39VDC, OFF at < 35VDC

Regards

Rock Shao

  • 0
    TI__Genius 9790 points

    Hi, Rock

    Thanks for your interest in TI here. I will be happy to route your request into the appropriate team to support. Please note the team that supports this device is in the US so they will have a delayed response due to the US holiday. Please expect a response in the week of Jan 4th.

    Yunsheng

  • 0 in reply to Yunsheng Qu
    TI__Guru 73215 points

    Hi,

    LM5026 but no OVP on chip.

    UCC2897A or UCC2891 ( they are on the same core deign and same features) but no latch OVP on chip. OCP in cycle-by-cycle current limit, and hiccup OCP may need to add additional circuit to work with the IC feature.

    Other specs look ok to achieve.